Hach LANGE Manual Del Usuario página 15

W A R N I N G
Potential Electrocution Hazard. Only qualified personnel should conduct
the tasks described in this section of the manual.
N O T I C E
Potential Instrument Damage. Delicate internal electronic components
can be damaged by static electricity, resulting in degraded performance
or eventual failure.
If a measurement problem exists, perform the following steps.
1. Inspect the sensor cable for physical damage.
2. If an interconnect cable is used, check the junction box.
a. Disconnect the cable at both ends (sensor and controller).
b. Use an ohmmeter to check the wires for continuity and internal
shorts.
Sensor diagnostic and test menu
The sensor diagnostic and test menu shows current and historical
information about the instrument. Refer to
diagnostic and test menu, push the MENU key and select Sensor Setup,
[Select Sensor], DIAG/TEST.
Table 4 Sensor DIAG/TEST menu
Option Description
MODULE Shows the version and the serial number for the
INFORMATION sensor module.
SENSOR Shows the name and serial number that was entered
INFORMATION by the user.
CAL DAYS Shows the number of days since the last calibration.
CAL HISTORY Shows a list of and details for each calibration.
RESET CAL HISTORY Resets the calibration history for the sensor (requires
service-level passcode). All previous calibration data
is lost.
Table 4. To access the sensor
Table 4 Sensor DIAG/TEST menu (continued)
Option Description
SENSOR DATA Shows the number of days that the sensor has been
in operation and the current sensor signal reading in
ms.
RESET SENSOR Resets the number of days that the sensor has been
in operation and the calibration data to defaults.
Error list
Errors may occur for various reasons. The reading on the measurement
screen flashes. All outputs are held when specified in the controller menu.
To show the sensor errors, push the MENU key and select Diagnostics,
[Select Sensor], Error List. A list of possible errors is shown in
Table 5 Error list for the sensor
Error Description
SENSOR MISSING The sensor is missing or
disconnected
Warning list
A warning does not affect the operation of menus, relays and outputs. A
warning icon flashes and a message is shown on the bottom of the
measurement screen. To show the sensor warnings, push the MENU key
and select Sensor Diag, [Select Sensor], Warning List. A list of possible
warnings is shown in Table 6.
Table 6 Warning list for the sensor
Warning Description
TOTALIZER FULL The sensor volume/
totalizer is full.
TEMP WARNING The temperature is out of
scope.
Table 5.
Resolution
Examine the wiring and
connections for the
sensor and for the
module.
Resolution
Reset the sensor volume/
totalizer.
Replace the sensor.
English 15